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<div class="title">_awaker.h</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160; </div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor">#ifndef DOXYGEN_SKIP_PROPERTY</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160; </div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="keyword">namespace </span>resumef</div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;{</div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;    <span class="keyword">namespace </span>detail</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;    {</div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;        <span class="keyword">template</span>&lt;<span class="keyword">class </span>_Ety, <span class="keyword">class</span>... _Types&gt;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;        <span class="keyword">struct </span>_awaker</div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;        {</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;            <span class="comment">//如果超时</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;            <span class="comment">//      e 始终为nullptr</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;            <span class="comment">//      不关心返回值</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;            <span class="comment">//如果不是超时，</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;            <span class="comment">//      e 指向当前触发的事件，用于实现wait_any</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;            <span class="comment">//      返回true表示成功触发了事件，event内部减小一次事件计数，并删除此awaker</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;            <span class="comment">//      返回false表示此事件已经无效，event内部只删除此awaker</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;            <span class="keyword">typedef</span> std::function&lt;bool(_Ety * e, _Types...)&gt; callee_type;</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;        <span class="keyword">private</span>:</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;            <span class="keyword">typedef</span> spinlock lock_type;</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;            <span class="comment">//typedef std::recursive_mutex lock_type;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160; </div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;            lock_type _lock;</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;            callee_type _callee;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;            std::atomic&lt;intptr_t&gt; _counter;</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;        <span class="keyword">public</span>:</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;            _awaker(callee_type &amp;&amp; callee_, intptr_t init_count_ = 0)</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;                : _callee(std::forward&lt;callee_type&gt;(callee_))</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;                , _counter(init_count_)</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;            {</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;            }</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;            <span class="comment">//调用一次后，_callee就被置nullptr，下次再调用，必然返回false</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;            <span class="comment">//第一次调用，返回调用_callee的返回值</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;            <span class="comment">//超时通过传入nullptr来调用</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;            <span class="keywordtype">bool</span> awake(_Ety * e, intptr_t count_, <span class="keyword">const</span> _Types&amp;... args)</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;            {</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;                assert(count_ &gt; 0);</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;                scoped_lock&lt;lock_type&gt; lock_(this-&gt;_lock);</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160; </div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;                <span class="keywordflow">if</span> ((this-&gt;_counter.fetch_sub(count_) - count_) &lt;= 0)</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;                {</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;                    <span class="keywordflow">if</span> (this-&gt;_callee)</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;                    {</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;                        callee_type callee_ = std::move(this-&gt;_callee);</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;                        <span class="keywordflow">return</span> callee_(e, args...);</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;                    }</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;                    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;                }</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;                <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;            }</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160; </div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        <span class="keyword">private</span>:</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;            _awaker(<span class="keyword">const</span> _awaker &amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;            _awaker(_awaker &amp;&amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;            _awaker &amp; operator = (<span class="keyword">const</span> _awaker &amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;            _awaker &amp; operator = (_awaker &amp;&amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;        };</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    }</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;}</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160; </div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="preprocessor">#endif  //DOXYGEN_SKIP_PROPERTY</span></div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="preprocessor"> </span></div>
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